H2O: Mermaid Adventures
H2O - Abenteuer Meerjungfrau (original)
The lives of teenagers Emma, Cleo and Rikki are forever changed when a magical, forbidden island gives them the power to turn into mermaids.
Watch "H2O: Mermaid Adventures" from streaming services Netflix, MAX, Amazon Prime released in 2015. It's a family and animation show, and has a rating of 5.3 out of 10 from Imdb which is fairly okay for this kind of show.